/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.BluetoothChat;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.InvalidParameterException;
import java.util.UUID;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.content.Context;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

import com.example.android.BluetoothChat.PCMAudioRecoder.recordeOutputCallBack;

/**
 * This class does all the work for setting up and managing Bluetooth
 * connections with other devices. It has a thread that listens for incoming
 * connections, a thread for connecting with a device, and a thread for
 * performing data transmissions when connected.
 */
public class BluetoothAudioService implements recordeOutputCallBack {
	// Debugging
	private static final String TAG = "BluetoothAudioService";
	private static final boolean D = true;

	// Name for the SDP record when creating server socket
	private static final String NAME_SECURE = "BluetoothChatSecure";
	private static final String NAME_INSECURE = "BluetoothChatInsecure";

	// Unique UUID for this application
	private static final UUID MY_UUID_SECURE = UUID
			.fromString("0591e450-c99a-11e2-8b8b-0800200c9a66");
	private static final UUID MY_UUID_INSECURE = UUID
			.fromString("f6b2d2f0-c999-11e2-8b8b-0800200c9a66");

	// Member fields
	private final BluetoothAdapter mAdapter;
	private final Handler mHandler;
	private AcceptThread mSecureAcceptThread;
	private AcceptThread mInsecureAcceptThread;
	private ConnectThread mConnectThread;
	private ConnectedThread mConnectedThread;
	private int mState;

	// Constants that indicate the current connection state
	public static final int STATE_NONE = 0; // we're doing nothing
	public static final int STATE_LISTEN = 1; // now listening for incoming
												// connections
	public static final int STATE_CONNECTING = 2; // now initiating an outgoing
													// connection
	public static final int STATE_CONNECTED = 3; // now connected to a remote
													// device
	public static final int STATE_SENDAUDIOING = 4;

	/**
	 * Constructor. Prepares a new BluetoothChat session.
	 * 
	 * @param context
	 *            The UI Activity Context
	 * @param handler
	 *            A Handler to send messages back to the UI Activity
	 */
	public BluetoothAudioService(Context context, Handler handler) {
		mAdapter = BluetoothAdapter.getDefaultAdapter();
		mState = STATE_NONE;
		mHandler = handler;
	}

	private PCMAudioRecoder mPCMAudioRecoder;

	class DataType {
		/**
		 * 0表示文本 1 表示音频 2表示视频
		 */
		public byte datatype = 0;
		public int datalength = 0;
		/**
		 * 保留字段
		 */
		public int receove = 0;

		public int receove2 = 0;

		public int receove3 = 0;
	}

	@Override
	public void recordeOutput(byte[] data, int size) {
		// 添加包头 识别数据类型
		Log.i("audiorecode", "recordeOutput hte size:" + size);
		// byte[] data2 = new byte[size + 5];
		// DataType mDataType = new DataType();
		// mDataType.datatype = 1;
		// data2[0] = mDataType.datatype;
		// mDataType.datalength = size;
		// data2[1] = (byte) (0xff & mDataType.datalength);
		// data2[2] = (byte) ((0xff00 & mDataType.datalength) >> 8);
		// data2[3] = (byte) ((0xff0000 & mDataType.datalength) >> 16);
		// data2[4] = (byte) ((0xff000000 & mDataType.datalength) >> 24);
		// System.arraycopy(data, 0, data2, 5, size);
		// sendMessage(data2);
		if (isSendAudio) {
			sendMessage(data);
		}

	}

	void setupPCMRecord() {
		mPCMAudioRecoder = new PCMAudioRecoder();
		mPCMAudioRecoder.setRecordeOutputCallBack(this);
		mPCMAudioRecoder.recoder();

	}

	protected void stopRecodeAudio() {
		if (mPCMAudioRecoder != null) {
			mPCMAudioRecoder.stopRecode();
		} else {
			Log.w("audiorecode", "recode audio is  not start ");
		}
	}

	private void sendMessage(byte[] message) {
		// Check that we're actually connected before trying anything
		if (getState() != BluetoothChatService.STATE_CONNECTED) {
			Log.w(TAG, "BluetoothChatService  is  not start ");
			return;
		}
		if (message == null) {
			throw new InvalidParameterException("message bytes[] is null");
		}
		// Check that there's actually something to send
		if (message.length > 0) {
			// Get the message bytes and tell the BluetoothChatService to write
			write(message);
			// Reset out string buffer to zero and clear the edit text field
			// mOutStringBuffer.setLength(0);
			// mOutEditText.setText(mOutStringBuffer);
		}
	}

	/**
	 * Set the current state of the chat connection
	 * 
	 * @param state
	 *            An integer defining the current connection state
	 */
	private synchronized void setState(int state) {
		if (D)
			Log.d(TAG, "setState() " + mState + " -> " + state);
		mState = state;

		// Give the new state to the Handler so the UI Activity can update
		mHandler.obtainMessage(BluetoothChat.MESSAGE_STATE_CHANGE, state, -1)
				.sendToTarget();
	}

	/**
	 * Return the current connection state.
	 */
	public synchronized int getState() {
		return mState;
	}

	/**
	 * Start the chat service. Specifically start AcceptThread to begin a
	 * session in listening (server) mode. Called by the Activity onResume()
	 */
	public synchronized void start() {
		if (D)
			Log.d(TAG, "start audio service thread");

		// Cancel any thread attempting to make a connection
		if (mConnectThread != null) {
			mConnectThread.cancel();
			mConnectThread = null;
		}

		// Cancel any thread currently running a connection
		if (mConnectedThread != null) {
			mConnectedThread.cancel();
			mConnectedThread = null;
		}

		setState(STATE_LISTEN);

		// Start the thread to listen on a BluetoothServerSocket
		if (mSecureAcceptThread == null) {
			mSecureAcceptThread = new AcceptThread(true);
			mSecureAcceptThread.start();
		}
		if (mInsecureAcceptThread == null) {
			mInsecureAcceptThread = new AcceptThread(false);
			mInsecureAcceptThread.start();
		}
	}

	/**
	 * Start the ConnectThread to initiate a connection to a remote device.
	 * 
	 * @param device
	 *            The BluetoothDevice to connect
	 * @param secure
	 *            Socket Security type - Secure (true) , Insecure (false)
	 */
	public synchronized void connect(BluetoothDevice device, boolean secure) {
		if (D)
			Log.d(TAG, "connect to: " + device);

		// Cancel any thread attempting to make a connection
		if (mState == STATE_CONNECTING) {
			if (mConnectThread != null) {
				mConnectThread.cancel();
				mConnectThread = null;
			}
		}

		// Cancel any thread currently running a connection
		if (mConnectedThread != null) {
			mConnectedThread.cancel();
			mConnectedThread = null;
		}

		// Start the thread to connect with the given device
		mConnectThread = new ConnectThread(device, secure);
		mConnectThread.start();
		setState(STATE_CONNECTING);
	}

	/**
	 * Start the ConnectedThread to begin managing a Bluetooth connection
	 * 
	 * @param socket
	 *            The BluetoothSocket on which the connection was made
	 * @param device
	 *            The BluetoothDevice that has been connected
	 */
	public synchronized void connected(BluetoothSocket socket,
			BluetoothDevice device, final String socketType) {
		if (D)
			Log.d(TAG, "connected, Socket Type:" + socketType);

		// Cancel the thread that completed the connection
		if (mConnectThread != null) {
			mConnectThread.cancel();
			mConnectThread = null;
		}

		// Cancel any thread currently running a connection
		if (mConnectedThread != null) {
			mConnectedThread.cancel();
			mConnectedThread = null;
		}

		// Cancel the accept thread because we only want to connect to one
		// device
		if (mSecureAcceptThread != null) {
			mSecureAcceptThread.cancel();
			mSecureAcceptThread = null;
		}
		if (mInsecureAcceptThread != null) {
			mInsecureAcceptThread.cancel();
			mInsecureAcceptThread = null;
		}

		// Start the thread to manage the connection and perform transmissions
		mConnectedThread = new ConnectedThread(socket, socketType);
		mConnectedThread.start();

		// Send the name of the connected device back to the UI Activity
		Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_DEVICE_NAME);
		Bundle bundle = new Bundle();
		bundle.putString(BluetoothChat.DEVICE_NAME, device.getName());
		msg.setData(bundle);
		mHandler.sendMessage(msg);

		setState(STATE_CONNECTED);
	}

	/**
	 * Stop all threads
	 */
	public synchronized void stop() {
		if (D)
			Log.d(TAG, "stop");

		if (mConnectThread != null) {
			mConnectThread.cancel();
			mConnectThread = null;
		}

		if (mConnectedThread != null) {
			mConnectedThread.cancel();
			mConnectedThread = null;
		}

		if (mSecureAcceptThread != null) {
			mSecureAcceptThread.cancel();
			mSecureAcceptThread = null;
		}

		if (mInsecureAcceptThread != null) {
			mInsecureAcceptThread.cancel();
			mInsecureAcceptThread = null;
		}
		setState(STATE_NONE);
		isSendAudio= false;
		if (mPCMAudioRecoder!=null) {
			mPCMAudioRecoder.stopRecode();
			mPCMAudioRecoder.stopPlayer();
		}
	}

	/**
	 * Write to the ConnectedThread in an unsynchronized manner
	 * 
	 * @param out
	 *            The bytes to write
	 * @see ConnectedThread#write(byte[])
	 */
	public void write(byte[] out) {
		// Create temporary object
		ConnectedThread r;
		// Synchronize a copy of the ConnectedThread
		synchronized (this) {
			if (mState != STATE_CONNECTED)
				return;
			r = mConnectedThread;
		}
		// Perform the write unsynchronized
		r.write(out);
	}

	/**
	 * Indicate that the connection attempt failed and notify the UI Activity.
	 */
	private void connectionFailed() {
		// Send a failure message back to the Activity
		Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_TOAST);
		Bundle bundle = new Bundle();
		bundle.putString(BluetoothChat.TOAST, "Unable to connect device");
		msg.setData(bundle);
		mHandler.sendMessage(msg);

		// Start the service over to restart listening mode
		BluetoothAudioService.this.start();
	}

	/**
	 * Indicate that the connection was lost and notify the UI Activity.
	 */
	private void connectionLost() {
		// Send a failure message back to the Activity
		Message msg = mHandler.obtainMessage(BluetoothChat.MESSAGE_TOAST);
		Bundle bundle = new Bundle();
		bundle.putString(BluetoothChat.TOAST, "Device connection was lost");
		msg.setData(bundle);
		mHandler.sendMessage(msg);

		// Start the service over to restart listening mode
		BluetoothAudioService.this.start();
	}

	/**
	 * This thread runs while listening for incoming connections. It behaves
	 * like a server-side client. It runs until a connection is accepted (or
	 * until cancelled).
	 */
	private class AcceptThread extends Thread {
		// The local server socket
		private final BluetoothServerSocket mmServerSocket;
		private String mSocketType;

		public AcceptThread(boolean secure) {
			BluetoothServerSocket tmp = null;
			mSocketType = secure ? "Secure" : "Insecure";

			// Create a new listening server socket
			try {
				if (secure) {
					tmp = mAdapter.listenUsingRfcommWithServiceRecord(
							NAME_SECURE, MY_UUID_SECURE);
				} else {
					tmp = mAdapter.listenUsingInsecureRfcommWithServiceRecord(
							NAME_INSECURE, MY_UUID_INSECURE);
				}
			} catch (IOException e) {
				e.printStackTrace();
				Log.e(TAG, "Socket Type: " + mSocketType + "listen() failed", e);
			}
			mmServerSocket = tmp;
		}

		public void run() {
			if (D)
				Log.d(TAG, "Socket Type: " + mSocketType
						+ "BEGIN mAcceptThread" + this);
			setName("AcceptThread" + mSocketType);

			BluetoothSocket socket = null;

			// Listen to the server socket if we're not connected
			while (mState != STATE_CONNECTED) {
				try {
					// This is a blocking call and will only return on a
					// successful connection or an exception
					Log.i(TAG, "++++++waiting for blueclient to conncent+++++");
					socket = mmServerSocket.accept();
					mState = STATE_CONNECTING;
				} catch (IOException e) {
					Log.w(TAG, "Socket Type: " + mSocketType
							+ "accept() failed", e);
					break;
				}

				// If a connection was accepted
				if (socket != null) {
					synchronized (BluetoothAudioService.this) {
						switch (mState) {
						case STATE_LISTEN:
						case STATE_CONNECTING:
							// Situation normal. Start the connected thread.
							connected(socket, socket.getRemoteDevice(),
									mSocketType);
							break;
						case STATE_NONE:
						case STATE_CONNECTED:
							// Either not ready or already connected. Terminate
							// new socket.
							try {
								socket.close();
							} catch (IOException e) {
								Log.e(TAG, "Could not close unwanted socket", e);
							}
							break;
						}
					}
				}
			}
			if (D)
				Log.i(TAG, "END mAcceptThread, socket Type: " + mSocketType);

		}

		public void cancel() {
			if (D)
				Log.d(TAG, "Socket Type" + mSocketType + "cancel " + this);
			try {
				mmServerSocket.close();
			} catch (IOException e) {
				Log.e(TAG, "Socket Type" + mSocketType
						+ "close() of server failed", e);
			}
		}
	}

	/**
	 * This thread runs while attempting to make an outgoing connection with a
	 * device. It runs straight through; the connection either succeeds or
	 * fails.
	 */
	private class ConnectThread extends Thread {
		private final BluetoothSocket mmSocket;
		private final BluetoothDevice mmDevice;
		private String mSocketType;

		public ConnectThread(BluetoothDevice device, boolean secure) {
			mmDevice = device;
			BluetoothSocket tmp = null;
			mSocketType = secure ? "Secure" : "Insecure";

			// Get a BluetoothSocket for a connection with the
			// given BluetoothDevice
			try {
				if (secure) {
					tmp = device
							.createRfcommSocketToServiceRecord(MY_UUID_SECURE);
				} else {
					tmp = device
							.createInsecureRfcommSocketToServiceRecord(MY_UUID_INSECURE);
				}
			} catch (IOException e) {
				Log.e(TAG, "Socket Type: " + mSocketType + "create() failed", e);
			}
			mmSocket = tmp;
		}

		public void run() {
			Log.i(TAG, "BEGIN mConnectThread SocketType:" + mSocketType);
			setName("ConnectThread" + mSocketType);

			// Always cancel discovery because it will slow down a connection
			mAdapter.cancelDiscovery();

			// Make a connection to the BluetoothSocket
			try {
				// This is a blocking call and will only return on a
				// successful connection or an exception
				mmSocket.connect();
			} catch (IOException e) {
				// Close the socket
				try {
					mmSocket.close();
				} catch (IOException e2) {
					Log.e(TAG, "unable to close() " + mSocketType
							+ " socket during connection failure", e2);
				}
				connectionFailed();
				return;
			}

			// Reset the ConnectThread because we're done
			synchronized (BluetoothAudioService.this) {
				mConnectThread = null;
			}

			// Start the connected thread
			connected(mmSocket, mmDevice, mSocketType);
		}

		public void cancel() {
			try {
				mmSocket.close();
			} catch (IOException e) {
				Log.e(TAG, "close() of connect " + mSocketType
						+ " socket failed", e);
			}
		}
	}

	/**
	 * This thread runs during a connection with a remote device. It handles all
	 * incoming and outgoing transmissions.
	 */
	private class ConnectedThread extends Thread {
		private final BluetoothSocket mmSocket;
		private final InputStream mmInStream;
		private final OutputStream mmOutStream;
		private PCMAudioRecoder audioPlayer;
		private boolean isHasRecode = false;

		public ConnectedThread(BluetoothSocket socket, String socketType) {
			Log.d(TAG, "create ConnectedThread: " + socketType);
			mmSocket = socket;
			InputStream tmpIn = null;
			OutputStream tmpOut = null;

			// Get the BluetoothSocket input and output streams
			try {
				tmpIn = socket.getInputStream();
				tmpOut = socket.getOutputStream();
			} catch (IOException e) {
				Log.e(TAG, "temp sockets not created", e);
			}

			mmInStream = tmpIn;
			mmOutStream = tmpOut;
		}

		public void run() {
			Log.i(TAG, "BEGIN mConnectedThread");
			byte[] buffer = new byte[2048];
			int bytes;

			while (true) {
				Log.i(TAG, "run mConnectedThread ");
				if (isHasRecode == false) {// 采集音频
					new Thread() {
						public void run() {
							setupPCMRecord();
						};
					}.start();
					isHasRecode = true;
				}
				try {
					// Read from the InputStream
					Log.i(TAG, "red ");
					bytes = mmInStream.read(buffer);

					if (bytes > 0) {
						if (null == audioPlayer) {// 播放音频
							audioPlayer = new PCMAudioRecoder();
						}
						audioPlayer.backPlay(buffer, bytes);
					}
				} catch (IOException e) {
					Log.e(TAG, "disconnected", e);
					connectionLost();
					// Start the service over to restart listening mode
					BluetoothAudioService.this.start();
					break;
				}
			}
		}

		/**
		 * Write to the connected OutStream.
		 * 
		 * @param buffer
		 *            The bytes to write
		 */
		boolean isSendWrite = true;
		public void write(byte[] buffer) {
			try {
				mmOutStream.write(buffer);
				if (isSendWrite) {
					// Share the sent message back to the UI Activity
					mHandler.obtainMessage(BluetoothChat.MESSAGE_WRITE_AUDIO,
							buffer.length, -1, buffer).sendToTarget();
					isSendWrite = false;
					Log.i(TAG, "only send one SendWriteMessage ");
				}
			} catch (IOException e) {
				Log.e(TAG, "Exception during write", e);
			}
		}

		public void cancel() {
			try {
				mmSocket.close();
			} catch (IOException e) {
				Log.e(TAG, "close() of connect socket failed", e);
			}
		}
	}

	private boolean isSendAudio = false;

	/**
	 * 设置一个标志为true 等待线程发送数据
	 */
	public void sendAudio(UUID mUUID) {
		isSendAudio = true;
	}
}
